tree 86ca3250c46d75dcede1cd179fa1120cd72a7029
parent ea38ce081d155534494bac5df2bb0d343fb1679b
author Julia Cartwright <julia@ni.com> 1490136187 -0500
committer Linus Walleij <linus.walleij@linaro.org> 1490705708 +0200

gpio: 104-idi-48: make use of raw_spinlock variants

The 104-idi-48 gpio driver currently implements an irq_chip for handling
interrupts; due to how irq_chip handling is done, it's necessary for the
irq_chip methods to be invoked from hardirq context, even on a a
real-time kernel.  Because the spinlock_t type becomes a "sleeping"
spinlock w/ RT kernels, it is not suitable to be used with irq_chips.

A quick audit of the operations under the lock reveal that they do only
minimal, bounded work, and are therefore safe to do under a raw spinlock.

Signed-off-by: Julia Cartwright <julia@ni.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>